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# Copyright 1999-2017 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

EAPI=6

inherit cuda eutils flag-o-matic portability toolchain-funcs unpacker versionator

MYD=$(get_version_component_range 1)_$(get_version_component_range 2)

DESCRIPTION="NVIDIA CUDA Software Development Kit"
HOMEPAGE="http://developer.nvidia.com/cuda"
CURI="http://developer.download.nvidia.com/compute/cuda/${MYD}/rel/installers"
SRC_URI="
	amd64? ( ${CURI}/cuda_${PV}_linux_64.run )
	x86? ( ${CURI}/cuda_${PV}_linux_32.run )"

LICENSE="CUDPP"
SLOT="0"
KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
IUSE="debug +doc +examples opencl +cuda"

RDEPEND="
	~dev-util/nvidia-cuda-toolkit-${PV}
	media-libs/freeglut
	examples? (
		media-libs/freeimage
		media-libs/glew:0=
		virtual/mpi
		>=x11-drivers/nvidia-drivers-340.32[uvm]
		x86? ( <x11-drivers/nvidia-drivers-346.35[uvm] )
		)"
DEPEND="${RDEPEND}"

RESTRICT="test"

S=${WORKDIR}/cuda-samples

QA_EXECSTACK=(
	opt/cuda/sdk/0_Simple/cdpSimplePrint/cdpSimplePrint
	opt/cuda/sdk/0_Simple/cdpSimpleQuicksort/cdpSimpleQuicksort
	opt/cuda/sdk/bin/x86_64/linux/release/cdpSimplePrint
	opt/cuda/sdk/bin/x86_64/linux/release/cdpSimpleQuicksort
	)

src_unpack() {
	unpacker
	unpacker run_files/cuda-samples*run
}

pkg_setup() {
	if use cuda || use opencl; then
		cuda_pkg_setup
	fi

	if use x86; then
		ewarn "Starting with version 6.5 NVIDIA dropped more and more"
		ewarn "the support for 32bit linux."
		ewarn "Be aware that bugfixes and new features may not be available."
		ewarn "https://dev.gentoo.org/~jlec/distfiles/CUDA_Toolkit_Release_Notes.pdf"
	fi
}

src_prepare() {
	export RAWLDFLAGS="$(raw-ldflags)"
#	epatch "${FILESDIR}"/${P}-asneeded.patch

	sed \
		-e 's:-O2::g' \
		-e 's:-O3::g' \
		-e "/LINK/s:gcc:$(tc-getCC) ${LDFLAGS}:g" \
		-e "/LINK/s:g++:$(tc-getCXX) ${LDFLAGS}:g" \
		-e "/CC/s:gcc:$(tc-getCC):g" \
		-e "/GCC/s:g++:$(tc-getCXX):g" \
		-e "/NVCC /s|\(:=\).*|:= ${EPREFIX}/opt/cuda/bin/nvcc|g" \
		-e "/ CFLAGS/s|\(:=\)|\1 ${CFLAGS}|g" \
		-e "/ CXXFLAGS/s|\(:=\)|\1 ${CXXFLAGS}|g" \
		-e "/NVCCFLAGS/s|\(:=\)|\1 ${NVCCFLAGS} |g" \
		-e 's:-Wimplicit::g' \
		-e "s|../../common/lib/linux/\$(OS_ARCH)/libGLEW.a|$(pkg-config --libs glew)|g" \
		-e "s|../../common/lib/\$(OSLOWER)/libGLEW.a|$(pkg-config --libs glew)|g" \
		-e "s|../../common/lib/\$(OSLOWER)/\$(OS_ARCH)/libGLEW.a|$(pkg-config --libs glew)|g" \
		-i $(find . -type f -name "Makefile") || die

#		-e "/ALL_LDFLAGS/s|:=|:= ${RAWLDFLAGS} |g" \
	find common/inc/GL -delete || die
	find . -type f -name "*\.a" -delete || die

	eapply_user
}

src_compile() {
	use examples || return
	local myopts verbose="verbose=1"
	use debug && myopts+=" dbg=1"
	export FAKEROOTKEY=1 # Workaround sandbox issue in #462602
	emake \
		cuda-install="${EPREFIX}/opt/cuda" \
		CUDA_PATH="${EPREFIX}/opt/cuda/" \
		MPI_GCC=10 \
		${myopts} ${verbose}
}

src_test() {
	local _dir _subdir

	addwrite /dev/nvidiactl
	addwrite /dev/nvidia0

	for _dir in {0..9}*; do
		pushd ${_dir} > /dev/null
		for _subdir in *; do
			emake -C ${_subdir} run
		done
		popd > /dev/null
	done
}

src_install() {
	local i j f t crap=""

	if use doc; then
		ebegin "Installing docs ..."
			treecopy $(find -type f \( -name readme.txt -o -name "*.pdf" \)) "${ED}"/usr/share/doc/${PF}/
			docompress -x $(find "${ED}"/usr/share/doc/${PF}/ -type f -name readme.txt | sed -e "s:${ED}::")
		eend
	fi

	crap+=" *.txt Samples.htm*"

	ebegin "Cleaning before installation..."
		for i in ${crap}; do
			if [[ -e ${i} ]]; then
				find ${i} -delete || die
			fi
		done
		find -type f \( -name "*.o" -o -name "*.pdf" -o -name "readme.txt" \) -delete || die
	eend

	ebegin "Moving files..."
		for f in $(find .); do
			local t="$(dirname ${f})"
			if [[ ${t/obj\/} != ${t} || ${t##*.} == a ]]; then
				continue
			fi
			if [[ ! -d ${f} ]]; then
				if [[ -x ${f} ]]; then
					exeinto /opt/cuda/sdk/${t}
					doexe ${f}
				else
					insinto /opt/cuda/sdk/${t}
					doins ${f}
				fi
			fi
	done
	eend
}